import java.io.*;

import javax.servlet.*;
import javax.servlet.http.*;


public class HelloServlet extends HttpServlet {
	@Override
	protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		response.setContentType("text/plain");
		PrintWriter writer = response.getWriter();
		writer.write("ok");
		writer.flush();
		writer.close();
	}
}
